MAX6021AEUR-T

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The MAX6021AEUR-T is an off-line voltage reference that belongs to the Power Management Integrated Circuit (PMIC) category. Its intended application is for providing a regulated output voltage in a variety of commercial and industrial electronic applications. It is designed to operate with a minimum external component count, making it a very reliable and cost-effective solution for voltage reference in many electronic circuit applications. This article outlines the application field and working principle of the MAX6021AEUR-T.

Application Field

The MAX6021AEUR-T is particularly well-suited for a variety of commercial and industrial uses, including low-voltage (5 to 15V) power supply applications, line powering, valve linear control and many other such applications. The device operates in a wide range of temperatures, making it suitable for use in both outdoor and indoor environments.

The device works as an adjustable voltage source, with adjustable output voltages of up to 3.2V and input/output current levels of up to 250mA. The device is supplied in a compact dual-in-line (DIL) package, making it suitable for use in tight spaces where complexity of the circuitry is expected to be low.

Working Principle

At the heart of the MAX6021AEUR-T is a voltage reference circuit based on a precise, low-power bandgap reference circuit. The bandgap reference circuit is a temperature-stabilised circuit that generates a known, precise voltage that is used to provide a stable voltage reference in the device. This reference voltage is then compared to an adjustable voltage, and correct adjustments are made to the output voltage to keep it constant and stable despite variations in the input and load levels.

The device also employs a high-level hysteresis loop, which helps to maintain output stability over a wide temperature range. A special comparator arrangement is used to control the maximum output current, preventing any current overloads. Active rectifiers are used to protect the device from negative voltage transients or short-circuits. The device also incorporates active output protection, preventing any damage due to negative or positive transients.

The MAX6021AEUR-T is also equipped with a so-called adaptive frequency compensation circuit, designed to adjust the reference feedback loop and avoid oscillations at very low output levels. This allows the device to deliver a constant stable output voltage even when the input and output current levels are very low.

Safety Features

The MAX6021AEUR-T is designed with a variety of safety features to ensure its reliable operation over a wide range of ambient temperatures. For example, the device includes self-protecting current limiters, which will protect the device against excessively high current levels. The device also includes temperature-sensing and temperature-based shutdown features, which protect the device in the event that its temperature exceeds its safe working range.

The device also includes a low-voltage protection circuit, which prevents it from operating below its minimum safe operating voltage. Furthermore, the device is designed to detect any input overvoltages and will automatically shut down if excessive input voltages are detected. The device also incorporates internal circuits for reverse voltage protection, ensuring that the device does not suffer any damages due to accidental reverse polarities.

Conclusion

The MAX6021AEUR-T is an off-line voltage reference that belongs to the Power Management Integrated Circuit (PMIC) category. It is a reliable and cost-effective solution for voltage reference in many commercial, industrial and consumer electronics applications. The device operates in a wide range of temperatures and is equipped with a variety of safety features to ensure reliable operation in various environments. The device’s bandgap reference circuit, hysteresis loop and adaptive frequency compensation ensure that the output voltage is stable and consistent over a wide range of ambient conditions.

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